How to Set-Change Display Brightness from Command Line on Ubuntu Linux

June 17, 2014 | By the+gnu+linux+evangelist | Filed in: Tutorial.

Ubuntu Command to Dim Screen Brightness

The Tip Show How to Change/Set/Dim the Display/Screen Brightness by Command Line on Ubuntu Linux.

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  1. Open a Command Line Terminal Window
    (Press “Enter” to Execute Commands).


    Set-Change Display-Screen Brightness from Command Line on Ubuntu - Open Terminal
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  3. Find the Connected Display Interface.

    xrandr -q | grep "connected"

    Look in the Output to find the Interface…

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  5. Set the Screen Brightness.

    For Example:

    xrandr --output LVDS-1 --brightness 0.5
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